#content{
    position: absolute;
    left:70%;  
    top:50%;  
    margin:-100px 0 0 -150px 
}

#send_msg{
    width: 300px;
    height: 50px;
    background-color: #ffffff55;
    font-size: 30px;
    border: 2px solid rgba(255, 238, 204, 0.547)(255, 238, 204, 0.727); border-radius: 5px;
    vertical-align: top;
}

#send_button{
    width: 150px;
    height: 40px;
    background-color: aquamarine;
    font-size: 20px;
    margin-top: 20px;
    text-align: center;
}

#delete_button{
    width: 150px;
    height: 40px;
    background-color: aquamarine;
    font-size: 20px;
    margin-top: 20px;
    text-align: center;
}

#return_hall{
    position: absolute;
    top:10%;
    left:2%;
    width: 150px;
    height: 50px;
    font-size: 25px;
    background-color: rgba(95, 158, 160, 0.247);
}

#delete_button:active{

    background-color: rgb(137, 222, 118);
}

#send_button:active{

    background-color: rgb(137, 222, 118);
}

#ranking_list{
    position: absolute;
    left: 20%;
    top:12%;
    width: 500px;
    height: 560px;
    overflow-y: scroll;
    background-color: rgba(171, 182, 15, 0);
    color: rgb(21, 2, 2);
    border-radius: 10px;
}

td{
    text-align: center;
    padding-top: 10px;
    padding-bottom: 10px;
}


#prev_step{
    position: absolute;
    top:40%;
    left:23%;
    width: 150px;
    height: 50px;
    font-size: 25px;
    background-color: rgba(95, 158, 160, 0.247);
}

#prev_step:active{
    background-color: aquamarine;
}

#next_step{
    position: absolute;
    top:40%;
    left:68%;
    width: 150px;
    height: 50px;
    font-size: 25px;
    background-color: rgba(95, 158, 160, 0.247);
}

#next_step:active{
    background-color: aquamarine;
}

#user_tip{
    position: absolute;
    top:2%;
    left:45%;
    font-size: 30px;
}

#screen {
    width: 450px;
    height: 50px;
    margin-top: 10px;
    background-color: #ffffff71;
    font-size: 22px;
    line-height: 50px;
    text-align: center;
}

#container {
    width: 100%;
    height: calc(100% - 50px);

    display: flex;
    align-items: center;
    justify-content: center;
}